Because he said Charlotte isn't who she seems to be! Haha. "The mystery will be solved in short order" means to me that it was going to be a bigger mystery but it will be solved quickly b/c they're leaving. She can stay on and interact with Steffy and EJizzle!

LOL but she's a totally different character!

I don't think Corday would ever recast Kristen, especially with John out of the picture. Also the EJ soras-ing thing is really weird, so I bet he'd want to keep Kristen offscreen because of that.